Difficult isn't it - there is a lot about Cook the test player to like - the concentration, the ability against the short ball etc - but the fact is that bowlers have completely worked him out by now - they can more or less bowl half volleys at him with impugnity and anything that shapes back to the pads is becoming a secondary flaw.
Problem is, if dropped, thats more or less him finished. That being the case, the selectors will want to give him absolutely every conceiveable chance.